AU2022206670B2

AU2022206670B2 - Railcar damping system

Info

Publication number: AU2022206670B2
Application number: AU2022206670A
Authority: AU
Inventors: Neil Aaron Brant; James Scott Kennedy; Joseph Michael Shoup
Original assignee: A Stucki Co
Current assignee: A Stucki Co
Priority date: 2021-01-06
Filing date: 2022-01-05
Publication date: 2025-07-10
Anticipated expiration: 2042-01-05
Also published as: CA3204192A1; MX2023008050A; US20220212699A1; AU2022206670A1; WO2022150387A1

Abstract

Embodiments relate to a railcar damping system configured for placement in a railcar center sill having longitudinally spaced stops defining a center sill pocket. The system includes a damping assembly configured for receiving and dissipating external forces acting on a coupler connected to the damping system. Various embodiments of the damping system include a longitudinally moveable member, at least one stop and at least one follower block. Some embodiments include a housing. The shape, positioning, and configurations of these features allow for differentiated travel between buff and draft movements.

Description

WO wo 2022/150387 PCT/US2022/011313

RAILCAR DAMPING SYSTEM CROSS-REFERENCE CROSS-REFERENCE TO TO RELATED RELATED APPLICATIONS APPLICATIONS

[0001] This application is related to and claims the benefit of priority of co-pending U.S.

Provisional Application Nos. 63/134,302 filed on January 6, 2021, 63/175,164 filed on April

15, 2021, and 63/203,295 filed on July 16, 2021, the entire contents of each being

incorporated herein by reference.

FIELD OF THE INVENTION

[0002] Embodiments relate to a railcar damping system that provides for differentiated travel

between buff and draft movements and, in particular, the damping system allows for full

compression in buff but limited compression in draft.

BACKGROUND OF THE INVENTION

[0003] A railcar damping system is a device that is positioned at or near an end of a railcar

and is in mechanical connection with the railcar's coupler. When it is desired to couple a

railcar to another railcar, one of the railcars is advanced towards the other to generate an

impact coupling event - two couplers connect to each other to join the two railcars together.

The damping system absorbs and controllably dissipates energy of the impact SO so as to reduce

or eliminate damage to the railcars. This is known as a buff event. In addition, when a

locomotive causes the railcars (after they have been coupled to each other) to move for

transporting the railcars, the damping system absorbs and controllably dissipates energy to

mitigate damage to the railcars. This is known as a draft event. During travel, the damping

system again absorbs and dissipates energy via multiple buff and draft events to mitigate

damage due to slack between railcars, start-stop motion, in-train forces, cycling, changes in

topography, etc. topography, etc.

1

[0004] Conventional railcar damping systems provide means to absorb/dissipate energy, yet

they generally provide the same energy absorption/dissipation in in both buff and draft.

Benefits can be realized by having a damping system that provides for differentiated travel

for buff and draft movements and, in particular, limited travel for draft. Conventional

systems can be appreciated from U.S. Pat. No. 10,513,275, U.S. Pat. No. 10,384,696, U.S.

Pat. No. 10,308,263, U.S. Pat. No. 9,598,092, and U.S. Publ. No. 2015/0251651.

[0005] The present disclosure is directed toward overcoming one or more of the above-

mentioned problems, though not necessarily limited to embodiments that do.

SUMMARY OF THE INVENTION

[0006] Embodiments relate to a damping system facilitating travel in draft motion that differs

from travel in buff motion - i.e., it is able to dissipate more energy in buff than in draft,

protecting the car structure and lading during a buff event and limiting inter-car slack during

a draft event. The damping system compresses in both buff and draft motions, but various

features of the inventive damping system allow it to be compressed fully in the buff motion

for maximum energy absorption, while limiting travel in the draft motion by not permitting

full compression of the damping system SO so as to reduce inter-car slack.

[0007] An exemplary embodiment relates to a railcar damping system configured for

placement in a railcar center sill having longitudinally spaced front and rear stops defining a

center sill pocket. The system can have one or more front stops and one or more rear stops.

The system includes a yoke provided in the center sill pocket and having a longitudinal axis,

the yoke including opposing top and bottom walls extending longitudinally and including a

distal end wall connecting the top and bottom walls to define a yoke pocket. The system

includes a damping assembly disposed in the yoke pocket and configured for receiving and

dissipating external forces acting on a coupler connected to the yoke. The system includes a

longitudinally moveable member having a side wall extending longitudinally along the center sill pocket and having proximal and distal ends and an end wall connected to the side wall distal end, the end wall being transverse to the longitudinal axis and extending into the yoke pocket. The system includes a follower block provided within the yoke pocket for movement along the longitudinal axis, the follower block being positioned transversely of the longitudinal axis and including a flange portion defining opposing proximal and distal facing stop sides. The front stop(s) is disposed at a proximal end of the center sill pocket and the rear stop(s) is disposed at a distal end of the center sill pocket. The front stop includes a proximal stop surface and a distally extending portion extending longitudinally and terminating terminating inin a a distal distal stopstop surface. surface. In movement, In buff buff movement, the follower the follower blocktoward block is urged is urged the toward the distal end of the center sill pocket and engages the damping assembly, and the flange portion of the follower block travels along the distally extending portion of the front stop and engages the side wall of the longitudinally moveable member defining a full buff position. In draft movement, the longitudinally moveable member is urged toward the proximal end of the center sill pocket until the proximal end of the longitudinally moveable member engages the distal stop surface of the front stop defining a full draft position.

[0008] Another exemplary embodiment relates to a railcar damping system configured for

dissipating external forces acting on a coupler connected to the yoke. In some embodiments,

the damping assembly includes a housing having a side wall extending longitudinally along

the center sill pocket and having proximal and distal ends and an end wall connected to the side wall distal end, the end wall being transverse to the longitudinal axis and extending into the yoke pocket. The system includes a follower block provided within the yoke pocket for movement along the longitudinal axis, the follower block being positioned transversely of the longitudinal axis and including a flange portion defining opposing proximal and distal facing stop sides. The front stop(s) is disposed at a proximal end of the center sill pocket and the rear stop(s) is disposed at a distal end of the center sill pocket. The front stop includes a proximal stop surface and a distally extending portion extending longitudinally and terminating in a distal stop surface. In buff movement, the follower block is urged toward the distal end of the center sill pocket and engages the damping assembly, and the flange portion of the follower block travels along the distally extending portion of the front stop and engages the side wall of the housing defining a full buff position. In draft movement, the housing is urged toward the proximal end of the center sill pocket until the proximal end of the housing engages the distal stop surface of the front stop defining a full draft position.

[0009] Another exemplary embodiment relates to a railcar damping system configured for

dissipating external forces acting on a coupler connected to the yoke yoke.The Thesystem systemincludes includesa a

longitudinally moveable member having a side wall extending longitudinally along the center

sill pocket and having proximal and distal ends and an end wall connected to the side wall

distal end, the end wall being transverse to the longitudinal axis and extending into the yoke

pocket. The system includes a follower block provided within the yoke pocket for movement

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along the longitudinal axis, the follower block positioned transversely of the longitudinal axis

and including a protrusion defining opposing proximal and distal facing stop sides. The front

stop(s) is disposed at a proximal end of the center sill pocket and the rear stop(s) is disposed

at a distal end of the center sill pocket. The front stop includes a proximal stop surface and

two distally extending portions extending longitudinally and terminating in two distal stop

surfaces. InInbuff surfaces. movement, buff the the movement, follower block block follower is urged is toward urged the distal toward enddistal the of the end center of the center

sill pocket and engages the damping assembly, and the protrusion of the follower block

travels along the two distally extending portions of the front stop and engages the side wall of

the longitudinally moveable member defining a full buff position. In draft movement, the

longitudinally moveable member is urged toward the proximal end of the center sill pocket

until the proximal end of the longitudinally moveable member engages the two distal stop

surfaces of the front stop defining a full draft position.

[0010] Another exemplary embodiment relates to a railcar damping system configured for

dissipating external forces acting on a coupler connected to the yoke. The damping assembly

includes a housing having a side wall extending longitudinally along the center sill pocket

and having proximal and distal ends and an end wall connected to the side wall distal end, the

end wall transverse to the longitudinal axis and extending into the yoke pocket. The system

includes a follower block provided within the yoke pocket for movement along the

longitudinal axis, the follower block being positioned transversely of the longitudinal axis

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surfaces. In buff movement, the follower block is urged toward the distal end of the center

the housing defining a full buff position. In draft movement, the housing is urged toward the

proximal end of the center sill pocket until the proximal end of the housing engages the two

distal stop surfaces of the front stop defining a full draft position.

[0011] Another exemplary embodiment relates to a railcar damping system configured for

pocket, the side wall having an extension extending longitudinally from the side wall

proximal end. The system includes a follower block provided within the yoke pocket for

movement along the longitudinal axis, the follower block being positioned transversely of the

longitudinal axis and including a flange portion defining opposing proximal and distal facing stop sides. The front stop(s) is disposed at a proximal end of the center sill pocket and the rear stop(s) is disposed at a distal end of the center sill pocket. In buff movement, the follower block is urged toward the distal end of the center sill pocket and engages the damping assembly, and the flange portion of the follower block travels along the extension of the longitudinally moveable member and engages a distal stop surface of the longitudinal moveable member defining a full buff position. In draft movement, the longitudinally moveable member is urged toward the proximal end of the center sill pocket until a proximal stop stop surface surfaceofof thethe longitudinal moveable longitudinal membermember moveable engagesengages the frontthe stop defining front stopa defining full drafta full draft position.

[0012] Another exemplary embodiment relates to a railcar damping system configured for

end wall being transverse to the longitudinal axis and extending into the yoke pocket, and the

side wall having an extension extending longitudinally from the side wall proximal end. The

system includes a follower block provided within the yoke pocket for movement along the

and including a flange portion defining opposing proximal and distal facing stop sides. The

front stop(s) is disposed at a proximal end of the center sill pocket and the rear stop(s) is disposed at a distal end of the center sill pocket. In buff movement, the follower block is urged toward the distal end of the center sill pocket and engages the damping assembly, and the flange portion of the follower block travels along the extension of the housing and engages a distal stop surface of the housing defining a full buff position. In draft movement, the housing is urged toward the proximal end of the center sill pocket until a proximal stop surface of the housing engages the front stop defining a full draft position.

[0013] Another exemplary embodiment relates to a railcar damping system configured for

placement in a railcar center sill having longitudinally spaced front and intermediate stops

defining a center sill pocket. The system can have one or more front stops and one or more

intermediate stops. The system includes a yoke provided in the center sill pocket and having

a longitudinal axis, the yoke including opposing top and bottom walls extending

longitudinally and including a distal end wall connecting the top and bottom walls to define a

yoke pocket. The system includes a damping assembly disposed in the yoke pocket and

configured for receiving and dissipating external forces acting on a coupler connected to the

yoke. The system includes a longitudinally moveable member having a side wall extending

longitudinally along the center sill pocket and having proximal and distal ends and an end

wall connected to the side wall distal end, the end wall being transverse to the longitudinal

axis and extending into the yoke pocket. The system includes a front follower block provided

within the yoke pocket for movement along the longitudinal axis, the front follower block

being positioned transversely of the longitudinal axis, the front follower block having

opposing proximal and distal facing stop sides, and the front follower block being positioned

between the front and intermediate stops. The system includes a rear follower block provided

within the yoke pocket for movement along the longitudinal axis, the rear follower block

being positioned transversely of the longitudinal axis, the rear follower block having

opposing proximal and distal facing stop sides, and the rear follower block being positioned

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between the intermediate stop and the yoke distal end wall. The front stop(s) is disposed at a

proximal end of the center sill pocket and the intermediate stop(s) is disposed at a location

between theproximal between the proximal andand distal distal ends ends ofcenter of the the center sill pocket. sill pocket. In buff the In buff movement, movement, front the front

follower block is urged toward the distal end of the center sill pocket and engages the

damping assembly, and the front follower block further travels along the center sill pocket

and engages the side wall of the longitudinal moveable member defining a full buff position.

In draft movement, the rear follower block is urged toward the proximal end of the center sill

pocket until the rear follower block engages the intermediate stop defining a full draft

position.

[0014] Another exemplary embodiment relates to a railcar damping system configured for

a longitudinal axis, the yoke including opposing top and bottom walls extending

yoke. The damping assembly includes a housing having a side wall extending longitudinally

along the center sill pocket and having proximal and distal ends and an end wall connected to

the side wall distal end, the end wall being transverse to the longitudinal axis and extending

into the yoke pocket, and the side wall having a cut-out formed in a surface thereof defining a

proximal cut-out surface and a distal cut-out surface. The system includes a follower block

provided within the yoke pocket for movement along the longitudinal axis, the follower block

being positioned transversely of the longitudinal axis, and the follower block having

opposing proximal and distal facing stop sides. The front stop(s) is disposed at a proximal

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end of the center sill pocket and the intermediate stop(s) is disposed at a location between the

proximal and distal ends of the center sill pocket. In buff movement, the follower block is

urged toward the distal end of the center sill pocket and engages the damping assembly, and

the follower block further travels along the center sill pocket and engages the side wall of the

housing defining a full buff position. In draft movement, the housing is urged toward the

proximal end of the center sill pocket until the distal cut-out surface engages the intermediate

stop defining a full draft position.

[0015] Another exemplary embodiment related to a railcar damping system configured for

center sill pocket. The railcar damping system includes a yoke provided in the center sill

pocket and having a longitudinal axis. The yoke includes opposing top and bottom walls

extending longitudinally, and further includes a distal end wall connecting the top and bottom

walls to define a yoke pocket. The system includes a damping assembly disposed in the yoke

pocket. The damping assembly is configured for receiving and dissipating external forces

acting on a coupler connected to the yoke. The system includes a longitudinally moveable

member having a side wall extending longitudinally along the center sill pocket and has

proximal and distal ends and an end wall connected to the side wall distal end. The end wall

is transverse to the longitudinal axis and extends into the yoke pocket. The system includes a

follower block provided within the yoke pocket for movement along the longitudinal axis.

The follower block is positioned transversely of the longitudinal axis and includes opposing

proximal and distal facing stop sides. The front stop includes a proximal stop surface formed

on an inner surface of the front stop and a distally extending portion extending longitudinally

and terminating in a distal stop surface. In buff movement, the follower block is urged

toward the distal end of the center sill pocket and engages the damping assembly. The

follower block travels along the inner surface of the distally extending portion of the follower block and engages the side wall of the longitudinally moveable member defining a full buff position. In draft movement, the longitudinally moveable member is urged toward the proximal end of the center sill pocket until the proximal end of the longitudinally moveable member engages the distal stop surface of the front stop defining a full draft position.

[0016] Another exemplary embodiment relates to a railcar damping system configured for

placement in a railcar center sill having longitudinally spaced front, intermediate, and rear

stops defining a center sill pocket. The railcar damping system includes a yoke provided in

the center sill pocket having a longitudinal axis. The yoke including opposing top and

bottom walls extending longitudinally and includes a distal end wall connecting the top and

bottom walls to define a yoke pocket. The system includes a damping assembly disposed in

the yoke pocket and configured for receiving and dissipating external forces acting on a

coupler connected to the yoke. The system includes a longitudinally moveable member

having a side wall extending longitudinally along the center sill pocket and having proximal

and distal ends and an end wall connected to the side wall distal end. The end wall is

transverse to the longitudinal axis and extends into the yoke pocket. The system includes a

proximal and distal facing stop sides. The front stop includes a stop surface formed at a distal

end of the front stop. In buff movement, the follower block is urged toward the distal end of

the center sill pocket and engages the damping assembly. The follower block travels past the

intermediate stop and engages the side wall of the longitudinally moveable member defining

a full buff position. In draft movement, the longitudinally moveable member is urged toward

the proximal end of the center sill pocket until the proximal end of the longitudinally

moveable member engages a distal stop surface of the intermediate stop defining a full draft

PCT/US2022/011313

position. The follower block can be any one of square shaped, rectangular shaped, H-shaped,

or L-shaped.

[0017] It will be appreciated that the elements of the various embodiments are not limited to

that particular embodiment, but may be interchangeably combined to form yet further

embodiments, as contemplated herein and appreciated by one skilled in the art.

[0018] Embodiments of the damping system dissipate more energy and allow railcars to be

impacted at higher speeds than a traditional draft gears, without transferring higher forces to

the railcar structure and lading. The system does not require use of hydraulic fluids, which

typically lead to leaking problems. The damping systems disclosed herein are also able to be

installed into new cars or be retrofitted to replace existing damping systems (e.g., can be

retrofit to replace End of Car Cushioning units in AAR EOC pockets). Additional benefits

include:

The damping System fits in most AAR End of Car Cushioning pockets

including EOC-8, EOC-9, and EOC-10.

A draft gear with increased buff travel capable of fitting into EOC pockets.

A damping system that provides more cushioning in buff than traditional draft

gears.

A damping system that provides less travel in draft than in buff.

A damping system that allows for use of an extended coupler to accommodate

extended travel. extended travel.

A damping system that allows for use of a draft gear with friction clutch and

either either mechanical mechanical springs springs or or elastomer elastomer springs springs with with extended extended travel. travel.

A damping system that allows for use of an extended travel draft gear capable

of 6-8 inches of travel.

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A damping system that achieves performance close to EOC units without using

hydraulic cylinders.

[0019] Further features, aspects, objects, advantages, and possible applications of the present

invention will become apparent from a study of the exemplary embodiments and examples

described below, in combination with the Figures, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, aspects, features, advantages and possible applications

of the present innovation will be more apparent from the following more particular

description thereof, presented in conjunction with the following drawings. Like reference

numbers used in the drawings may identify like components.

[0021] FIG. 1 shows a railcar and an exemplary damping system.

[0022] FIG. 2 shows exemplary follower block and stop configurations that may be used with

an embodiment of the damping system.

[0023] FIGS. 3-5 show an exemplary embodiment of the damping system, in a full buff, full

draft, and neutral position, respectively.

[0024] FIGS. 6-8 show another exemplary embodiment of the damping system, in a full buff,

full draft, and neutral position, respectively.

[0025] FIGS. 9-11 show another exemplary embodiment of the damping system, in a full

buff, full draft, and neutral position, respectively.

[0026] FIGS. 12-14 show another exemplary embodiment of the damping system, in a full

buff, full draft, and neutral position, respectively.

[0027] FIGS. 15-17 show another exemplary embodiment of the damping system, in a full

buff, full draft, and neutral position, respectively.

[0028] FIGS. 18-20 show another exemplary embodiment of the damping system, in a full

buff, full draft, and neutral position, respectively.

[0029] FIG. 21 shows additional exemplary follower block and stop configurations that may

be used with an embodiment of the damping system.

[0030] FIGS. 22-24 show another exemplary embodiment of the damping system in a

neutral, full buff, and a full draft position, respectively.

[0031] FIG. 25 shows an exemplary follower block and an exemplary front stop that may be

used with the embodiments shown in FIGS. 22-24.

[0032] FIGS. 26-28 show an exemplary embodiment of the railcar damping system having a

square shaped follower block, the damping system being in a neutral position, a full buff

position, and a full draft position, respectfully.

[0033] FIG. 29 shows an exemplary square shaped follower block and exemplary front and

intermediate stops.

[0034] FIG. 30-32 show an exemplary embodiment of the railcar damping system having an

H-shaped follower block, the damping system being in a neutral position, a full buff position,

and a full draft position, respectively.

[0035] FIG. 33 shows an exemplary H-shaped follower block and exemplary front an

intermediate stops.

DETAILED DESCRIPTION OF THE INVENTION

[0036] The following description is of exemplary embodiments that are presently

contemplated for carrying out the present invention. This description is not to be taken in a

limiting sense, but is made merely for the purpose of describing the general principles and

features of various aspects of the present invention. The scope of the present invention is not

limited by this description.

[0037] Referring to FIG. 1, embodiments relate to a damping system 100 for a railcar 1.

Various embodiments of the damping system 100 include a damping means 102, stops 104

(sometimes referred to as lugs), at least one follower block 106, a yoke 108, and a coupler

110. The damping means 102 includes a member and other components (e.g., springs,

elastomers, etc.) to facilitate damped longitudinal movement along a longitudinal axis 2 of

the member. In some embodiments of the damping means 102, the member is or includes a

longitudinal moveable member or a housing that contains the longitudinally moveable

member and other components.

[0038] The damping means 102 is secured to a railcar frame 3. For instance, the railcar

frame 3 has a center sill pocket 4 within which the damping means 102 is secured. The

center sill pocket 4 of the railcar frame 3 is located at or near a distal end of the railcar 1, and

is a square or rectangular pocket that is sized to receive the damping means 102. In an

exemplary embodiment, the center sill pocket 4 is rectangular and is configured to have its

long axis be aligned (coaxial or parallel) with the longitudinal axis 2 of the railcar 1. The

damping means 102 is placed within the center sill pocket 4 SO so that its rear end is more distal

relative to the distal end of the railcar 1 than its front end is. The damping means 102 is held

in place within the center sill pocket 4 by front stops 104 and rear stops 104 (and in some

cases intermediate stops 104) that are secured (e.g., via a fastener, weld, etc.) to the railcar

frame 3, that form the center sill pocket 4. For instance, the center sill pocket 4 is sized to

allow allow the thedamping means damping 102 102 means to be toinserted thereintherein be inserted and be slid in aslid and be direction back and forth in a direction back and forth

along the longitudinal axis 2 but be bounded in that longitudinal movement by the stops 104.

The stops 104 are attached to the frame 3 and form or define the center sill pocket 4 SO so that

when the damping means 102 moves, the longitudinal moveable member (and in some cases

the housing) abuts against one of the stops 104 to arrest further movement. It is important to

note that the damping means 102 is intended to move within the center sill pocket 4, but that

the stops 104 bound that movement to achieve the desired level of draft and buff motion for

the damping system 100.

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[0039] A coupler 110 is mechanically connected to a yoke 108, each of which are rectangular

or cylindrical members that is aligned with the longitudinal axis 2 of the railcar 1. The

coupler 110 has a coupling end 110a and a yoke-engaging end 110b. The coupling end 110a

is configured to mechanically couple to another coupler via coupling impact - e.g., the

coupling end 110a can be a Janney style coupler, a SA3 style coupler, a Scharfenberg stype

coupler, etc. The yoke-engaging end 110b can facilitate attachment to the yoke 108 via a pin-

and-hole, a cotter-pin type securement, etc. The yoke 108 is a member that sides within the

center sill pocket 4 but also surrounds, envelops, or cradles the damping means 102. For

instance, the yoke 108 has a coupler-engaging end 108a (e.g., a pin-and-hole, a cotter-pin

type securement, etc.) and a cradle end 108b. The cradle end 108b envelops the damping

means 102. While the yoke 108 cradles the damping means 102, it also allows for relative

motion between the yoke 108 and the damping means 102. Thus, when the coupler 110 is

impacted, the coupler 110 and the yoke 108 are both caused to move towards the damping

means 102 - this is a buff motion. The coupler 110 and yoke 108 both move relative to the

damping means 102 SO so as to allow the coupler's yoke-engaging end 110b to impact the

longitudinal moveable member. Depending on the arrangement of the stops 104, the follower

block 106, and the housing (if one is used), compression of the damping means 102 may

begin at this point. When the coupler 110 is pulled, the coupler 110 and the yoke 108 are

both caused to move away from the damping means 102 - this is draft motion. The coupler

110 and yoke 108 both move relative to the damping means 102 SO so as to allow the cradle end

108b to impact the longitudinal moveable member (or the housing if one is used), thereby

allowing further movement of the coupler 110 in that same direction to pull the damping

means 102 along with it. Depending on the arrangement of the stops 104, follower bock 106,

and the housing (if one is used), the damping means 102 is pulled along until it abuts a stop

104, causing a transfer of force to the railcar frame 3 and movement of the railcar 1.

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[0040] As will be explained in more detail, the buff and draft motions can be controlled via

different configurations and placements of the stops 104, follower blocks 106, and housing (if

one is used).

[0041] Each embodiment of the damping means 102 has a longitudinal moveable member.

Depending on the arrangement, some damping means 102 include a housing and some do

not. In each embodiment, the damping means 102 is designed to fit within the center sill

pocket 4 SO so that its rear end is adjacent the center sill pocket distal end 5, its front end is

adjacent the center sill pocket proximal end 6, and movement of the longitudinal moveable

member is along the longitudinal axis 2. The yoke 108 cradles the damping means 102 SO so

that the cradle end 108b is situated within the center sill pocket distal end 5 and the coupler-

engaging end 108a is situated within the center sill pocket proximal end 6. The coupler-

engaging end 108a includes a step 112 (e.g. flange, bevel, collar, etc.) that causes the width of

the yoke 108 to increase - i.e., the yoke 108 has a constant width starting from the cradle end

108b until the step 112, wherein at the step 112 the width increases just before the coupler-

engaging end 108a.

[0042] The damping system 100 has a front follower block 106. The front follower block

106 is positioned within the center sill pocket 4 and is located between the longitudinal

moveable member (or housing if one is used) and the step 112. Some embodiments include a

rear follower block 106. The rear follower block 106 is positioned within the center sill

pocket 4 and is located between the longitudinal moveable member (or housing if one is

used) and the cradle end 108b of the yoke 108.

[0043] Discussion of the various embodiments of the damping system 100 will involve the

damping system 100 being in a neutral position, a full buff position, and a full draft position.

Discussions will also involve buff movement and draft movement. The damping system 100

is in a neutral position when the damping means 102 is minimally compressed (technically,

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there is always some amount of compression in the draft means 102 (i.e., draft gear) when it

is installed into the center sill pocket 4 (i.e., draft sill assembly)) and when there is no draft

motion or buff motion. The damping system 100 is in a buff position when the damping

means 102 is compressed or compressing and there is a buff motion. When, during buff

motion, the damping system 100 arrests longitudinal moveable member or housing

movement, the damping system 100 is said to be in full buff position. Embodiments of the

damping system 100 allow for full compression of the damping system 100 when in a full

buff position. The damping system 100 is in a draft position when the damping means 102 is

compressed or compressing and there is a draft motion. When, during draft motion, the

damping system 100 arrests longitudinal moveable member or housing movement, the

damping system 100 is said to be in a full draft position. Embodiments of the damping

system 100 allow for partial compression of the damping system 100 when in a full draft

position.

Buff Motion For All Embodiments

[0044] As the yoke 108 is moved in a buff motion, the coupler 110 advances and engages

against the front follower block 106 to cause it to advance towards the longitudinal moveable

member (or housing). As the buff motion continues, the front follower block 106 presses

against the damping means 102 to cause compression of the damping means 102 until the

damping system 100 experiences full compression. The stops 104 are out of the path of the

yoke 108 but in the path of the longitudinal moveable member (or housing). When the

damping means 102 is caused to move in buff motion, rear or intermediate stops 104

(depending on the embodiment) arrest movement of the longitudinal moveable member (or

housing) beyond a certain point. This arrested movement of the longitudinal moveable

member (or housing) allows the front follower block 106 to fully compress the damping

means 102. When the longitudinal moveable member (or housing) movement is arrested and

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the damping means 102 is fully compressed, the damping system 100 is in full buff position.

When in full buff position, no further movement towards the center sill pocket distal end 5 of

the coupler 110, yoke 108, or longitudinal moveable member (or housing) can be achieved.

Note Note that thatininfull buff full position, buff the damping position, means 102 the damping is fully means 102 iscompressed. fully compressed.

Neutral Position For All Embodiments

[0045] After being in a full buff position, the damping means 102 extends, pushing (or at

least biasing) the front follower block 106, yoke 108, and coupler 110 towards the center sill

pocket proximal end 6. The damping means 102 can push the front follower block 106, yoke

108, and coupler 110 until the damping system 100 reaches a neutral position.

[0046] During a draft motion from a buff position, the coupler 110 and yoke 108 pull the

longitudinal moveable member (or housing) towards the center sill pocket proximal end 6 SO so

that the longitudinal moveable member (or housing) moves away from the rear or

intermediate stops 104. As will be explained, the front stops 104 then come into play to limit

the motion of the longitudinal moveable member (or housing) during further draft motion.

[0047] When leaving a buff position due to a draft motion or due to the biasing force of the

damping means 102, the damping means 102 starts to decompress and transition the damping

system 100 to a neutral position. When transitioning to the neutral position, the longitudinal

moveable member (or housing) abuts against and advances the front follower block 106

towards the center sill pocket proximal end 6. This occurs until the front follower block 106

abuts a stop surface of the front stop 104 to arrest movement of the front follower block 106

any further towards the center sill pocket proximal end 6. At this point, the damping system

100 is in a neutral position.

Draft Motion For Embodiments Having Front And Rear Stops

[0048] For embodiments having front and rear stops 104, during further draft motion, the

coupler 110 and yoke 108 pull the longitudinal moveable member (or housing) towards the

center sill pocket proximal end 6 SO so that the longitudinal moveable member (or housing)

moves away from the rear stops 104. The damping means 102 pushes against the front

follower block 106, but because the follower block 106 is held stationary by the front stop

104, the damping means 102 begins to compress. The movement of the coupler 110 and

yoke 108, as well as the compression of the damping means 102, continues until the

longitudinal moveable member (or housing) abuts the front stop 104, thereby arresting any

further movement of the longitudinal moveable member (or housing) towards the center sill

pocket proximal end 6. At this point, the damping system 100 is in full draft position. Note

the damping means 102 is not fully compressed in the full draft position.

Draft Motion For Embodiments Having Front And Intermediate Stops And Front And

Rear Follower Blocks

[0049] For embodiments having front and intermediate stops 104 and front and rear follower

blocks 106, during further draft motion, the coupler 110 and yoke 108 pull the longitudinal

moveable member (or housing) towards the center sill pocket proximal end 6 SO so that the

longitudinal moveable member (or housing) moves away from the intermediate stops 104.

The damping means 102 pushes against the front follower block 106, but because the front

follower block 106 is held stationary by the front stop 104, the damping means 102 begins to

compress. The movement of the coupler 110 and yoke 108, as well as the compression of the

damping means 102, continues until the rear follower block 106 abuts the intermediate stop

104, thereby arresting any further movement of the longitudinal moveable member towards

the center sill pocket proximal end 6. At this point, the damping system 100 is in full draft

position. Note the damping means 102 is not fully compressed in the full draft position.

PCT/US2022/011313

Draft Motion For Embodiments Having Front And Intermediate Stops And A Front

Follower Block

[0050] For embodiments having front and intermediate stops 104 and a front follower block

106, during further draft motion, the coupler 110 and yoke 108 pull the housing towards the

center sill pocket proximal end 6 SO so that the housing moves away from the intermediate stops

104. The damping means 102 pushes against the follower block 106, but because the

damping means 102, continues until a cut-out in the housing abuts the intermediate stop 104,

thereby arresting any further movement of the housing towards the center sill pocket

proximal end 6. At this point, the damping system 100 is in full draft position. Note the

damping system 100 is not fully compressed in the full draft position.

Detailed Description Of Various Embodiments

[0051] Referring to FIGS. 3-5, a first embodiment of the railcar damping system 200 is

illustrated. The railcar center sill pocket 4 has longitudinally spaced front and rear stops

204a, 204b, defining a center sill pocket 4. The damping system 200 can have one or more

front stops 204a and one or more rear stops 204b. For instance, the damping system 200 can

have two front stops 204a, each positioned on either side of the frame 3 at a proximal end 6

of the center sill pocket 4. The damping system 200 can have two rear stops 204b, each

positioned on either side of the frame 3 at a distal end 5 of the center sill pocket 4. A yoke

208 is provided in the center sill pocket 4, the yoke 208 being an elongated member and

oriented along the longitudinal axis 2. The yoke 208 has opposing top and bottom walls

208a, 208b extending longitudinally. The yoke 208 further has a distal end wall 208c

connecting the top and bottom walls 208a, 208b to define a yoke pocket 208d. A damping

PCT/US2022/011313

assembly 202 (or damping means) is disposed in the yoke pocket 208d, and is configured for

receiving and dissipating external forces acting on a coupler 210 connected to the yoke 208.

[0052] The damping system 200 includes a longitudinally moveable member 214 having at

least one side wall 214a extending longitudinally along the center sill pocket 4. The

longitudinally moveable member 214 has proximal and distal ends 214b, 214c and an end

wall 214d connected to the side wall distal end 214c. The end wall 214d is configured to be

transverse to the longitudinal axis 2 and to extend into the yoke pocket 208d.

[0053] The damping system 200 has a follower block 206 positioned within the yoke pocket

208d for movement along the longitudinal axis 2. The follower block 206 is positioned

transversely of the longitudinal axis 2 and includes a flange portion 206a defining opposing

proximal and distal facing stop sides 206b, 206c. For instance, the follower block 206 can be

a planar member that is I-shaped or H-shaped, such a shape having a web portion and at least

one flange portion 206a.

[0054] The embodiment shown in FIGS. 3-5 has two front stops 204a and two rear stops

204b. Each front stop 204a is disposed at a proximal end 6 of the center sill pocket 4. Each

rear stop 204b is disposed at a distal end 5 of the center sill pocket 4. At least one front stop

204a includes a proximal stop surface 216 and a distally extending portion 218 extending

longitudinally and terminating in a distal stop surface 220. For instance, the front stop 204a

can be a planar member that is T-shaped, such shape having a tail that is the distally

extending portion 218.

[0055] In buff movement, the follower block 106 is urged toward the distal end 5 of the

center sill pocket 4 and engages the damping assembly 202. The flange portion 206a of the

follower block 106 travels along the distally extending portion 218 of the front stop 204a and

engages the side wall 214a of the longitudinally moveable member 214, defining a full buff

position.

PCT/US2022/011313

[0056] In draft movement, the longitudinally moveable member 214 is urged toward the

proximal end 6 of the center sill pocket 4 until the proximal end 214b of the longitudinally

moveable member 214 engages the distal stop surface 220 of the front stop 204a, defining a

full draft position.

[0057] The rear stops 204b in this embodiment can be in a shape other than square or

rectangular. For instance, the rear stops 204b can be wedge shaped. The front stops 204a can

also exhibit a taper SO so as to be wider at the distal stop surface 220 but narrow at proximal stop

surface surface216. 216.

[0058] Referring to FIGS. 6-8, a second embodiment of the railcar damping system 300 is

304a, 304b, defining a center sill pocket 4. The damping system 300 can have one or more

front stops 304a and one or more rear stops 304b 304b.For Forinstance, instance,the thedamping dampingsystem system300 300can can

have two front stops 304a, each positioned on either side of the frame 3 at a proximal end 6

of the center sill pocket 4. The damping system 300 can have two rear stops 304b, each

308 is provided in the center sill pocket 4, the yoke 308 being an elongated member and

oriented along the longitudinal axis 2. The yoke 308 has opposing top and bottom walls

308a, 308b extending longitudinally. The yoke 308 further has a distal end wall 308c

connecting the top and bottom walls 308a, 308b to define a yoke pocket 308d. A damping

assembly 302 (or damping means) is disposed in the yoke pocket 308d, and is configured for

receiving and dissipating external forces acting on a coupler 310 connected to the yoke 308.

[0059] The damping system 300 includes a housing 314 having at least one side wall 314a

extending longitudinally along the center sill pocket 4. The housing 314 has proximal and

distal ends 314b, 314c and an end wall 314d connected to the side wall distal end 314c. The

WO wo 2022/150387 PCT/US2022/011313

end wall 314d is configured to be transverse to the longitudinal axis 2 and to extend into the

yoke pocket 308d.

[0060] The damping system 300 has a follower block 306 positioned within the yoke pocket

308d for movement along the longitudinal axis 2. The follower block 306 is positioned

transversely of the longitudinal axis 2 and includes a flange portion 306a defining opposing

proximal and distal facing stop sides 306b, 306c. For instance, the follower block 306 can be

one flange portion 306a.

[0061] The embodiment shown in FIGS. 6-8 has two front stops 304a and two rear stops

304b. 304b. Each Eachfront stop front 304a304a stop is disposed at a proximal is disposed end 6 ofend at a proximal the 6center of thesill pocketsill center 4. Each pocket 4. Each

rear stop 304b is disposed at a distal end 5 of the center sill pocket 4. At least one front stop

304a includes a proximal stop surface 316 and a distally extending portion 318 extending

longitudinally and terminating in a distal stop surface 320. For instance, the front stop 304a

extending portion 318.

[0062] In buff movement, the follower block 306 is urged toward the distal end 5 of the

center sill pocket 4 and engages the damping assembly 302. The flange portion 306a of the

follower block 306 travels along the distally extending portion 318 of the front stop 304a and

engages the side wall 314a of the housing 314, defining a full buff position.

[0063] In draft movement, the housing 314 is urged toward the proximal end 6 of the center

sill pocket 4 until the proximal end 314b of the housing 314 engages the distal stop surface

320 of the front stop 304a, defining a full draft position.

[0064] The rear stops 304b in this embodiment can be in a shape other than square or

rectangular. For instance, the rear stops 304b can be wedge shaped. The front stops 304a can also exhibit a taper SO so as to be wider at the distal stop surface 320 but narrow at proximal stop surface 316.

[0065] Referring to FIGS. 9-11, a third embodiment of the railcar damping system 400 is

404a, 404b, defining a center sill pocket 4. The damping system 400 can have one or more

front stops 404a and one or more rear stops 404b. For instance, the damping system 400 can

have two front stops 404a, each positioned on either side of the frame 3 at a proximal end 6

of the center sill pocket 4. The damping system 400 can have two rear stops 404b, each

408 is provided in the center sill pocket 4, the yoke 408 being an elongated member and

oriented along the longitudinal axis 2. The yoke 408 has opposing top and bottom walls

408a, 408b extending longitudinally. The yoke 408 further has a distal end wall 408c

connecting the top and bottom walls 408a, 408b to define a yoke pocket 408d. A damping

assembly 402 (or damping means) is disposed in the yoke pocket 408d, and is configured for

receiving and dissipating external forces acting on a coupler 410 connected to the yoke 408.

[0066] The damping system 400 includes a longitudinally moveable member 414 having at

least one side wall 414a extending longitudinally along the center sill pocket 4. The

longitudinally moveable member 414 has proximal and distal ends 414b, 414c and an end

wall 414d connected to the side wall distal end 414c. The end wall 414d is configured to be

transverse to the longitudinal axis 2 and to extend into the yoke pocket 408d. The side wall

414a of the longitudinally moveable member 414 has an extension 414e extending

longitudinally from the side wall proximal end 414b. For instance, the side wall 414a can be

T-shaped, such shape having a tail that is the extension 414e.

[0067] The damping system 400 has a follower block 406 positioned within the yoke pocket

408d for movement along the longitudinal axis 2. The follower block 406 is positioned transversely of the longitudinal axis 2 and includes a flange portion 406a defining opposing proximal and distal facing stop sides 406b, 406c. For instance, the follower block 406 can be a planar member that is I-shaped or H-shaped, such a shape having a web portion and at least one flange portion 406a.

[0068] The embodiment shown in FIGS. 9-11 has two front stops 404a and two rear stops

404b. Each front stop 404a is disposed at a proximal end 6 of the center sill pocket 4. Each

rear stop 404b is disposed at a distal end 5 of the center sill pocket 4. The front and rear stops

404a, 404b in this embodiment can be square or rectangular.

[0069] The extension 414e of the side wall 414a of the longitudinally moveable member 414

has a proximal stop surface 414f and a distal stop surface 414g.

[0070] In buff movement, the follower block 406 is urged toward the distal end 5 of the

center sill pocket 4 and engages the damping assembly 402, and the flange portion 406a of

the follower block 406 travels along the extension 414e of the longitudinally moveable

member 414 and engages a distal stop surface 414g of the longitudinal moveable member

414, defining a full buff position.

[0071] In draft movement, the longitudinally moveable member 414 is urged toward the

proximal end 6 of the center sill pocket 4 until a proximal stop surface 414f of the

longitudinal moveable member 414 engages the front stop 404a, defining a full draft position.

[0072] The rear stops 404b in this embodiment can be in a shape other than square or

rectangular. For instance, the rear stops 404b can be wedge shaped.

[0073] Referring to FIGS. 12-14, a fourth embodiment of the railcar damping system 500 is

504a, 504b, defining a center sill pocket 4. The damping system 500 can have one or more

front stops 504a and one or more rear stops 504b. For instance, the damping system 500 can

have two front stops 504a, each positioned on either side of the frame 3 at a proximal end 6 of the center sill pocket 4. The damping system 500 can have two rear stops 504b, each positioned positioned on on either either side side of of the the frame frame 33 at at aa distal distal end end 55 of of the the center center sill sill pocket pocket 4. 4. AA yoke yoke

508 is provided in the center sill pocket 4, the yoke 508 being an elongated member and

oriented along the longitudinal axis 2. The yoke 508 has opposing top and bottom walls

508a, 508b extending longitudinally. The yoke 508 further has a distal end wall 508c

connecting the top and bottom walls 508a, 508b to define a yoke pocket 508d. A damping

assembly 502 (or damping means) is disposed in the yoke pocket 508d, and is configured for

receiving and dissipating external forces acting on a coupler 510 connected to the yoke 508.

[0074] The damping system 500 includes a housing 514 having at least one side wall 514a

extending longitudinally along the center sill pocket 4. The housing 514 has proximal and

distal ends 514b, 514c and an end wall 514d connected to the side wall distal end 514c. The

end wall 514d is configured to be transverse to the longitudinal axis 2 and to extend into the

yoke pocket 508d. The side wall 514a of the housing 514 has an extension 514e extending

longitudinally from the side wall proximal end 514b. For instance, the side wall 514a can be

T-shaped, such shape having a tail that is the extension 514e.

[0075] The damping system 500 has a follower block 506 positioned within the yoke pocket

508d for movement along the longitudinal axis 2. The follower block 506 is positioned

transversely of the longitudinal axis 2 and includes a flange portion 506a defining opposing

proximal and distal facing stop sides 506b, 506c. For instance, the follower block 506 can be

one flange portion 506a.

[0076] The embodiment shown in FIGS. 12-14 has two front stops 504a and two rear stops

504b. Eachfront 504b. Each front stop stop 504a 504a is disposed is disposed at a proximal at a proximal end 6 ofend the6center of the center sill pocketsill pocket 4. Each 4. Each

rear stop 504b is disposed at a distal end 5 of the center sill pocket 4. The front and rear stops

504a, 504b in this embodiment can be square or rectangular.

[0077] The extension 514e of the side wall 514a of the housing 514 has a proximal stop

surface 514f and a distal stop surface 514g.

[0078] In buff movement, the follower block 506 is urged toward the distal end 5 of the

center sill pocket 4 and engages the damping assembly 502, and the flange portion 506a of

the follower block 506 travels along the extension 514e of the housing 514 and engages a

distal stop surface 514g of the housing 514, defining a full buff position.

[0079] In draft movement, the housing 514 is urged toward the proximal end 6 of the center

sill pocket 4 until a proximal stop surface 514f of the housing 514 engages the front stop

504a, defining a full draft position.

[0080] The rear stops 504b in this embodiment can be in a shape other than square or

rectangular. For instance, the rear stops 504b can be wedge shaped.

[0081] Referring to FIGS. 15-17, a fifth embodiment of the railcar damping system 600 is

illustrated. The railcar center sill pocket 4 has longitudinally spaced front and intermediate

stops 604a, 604c, defining a center sill pocket 4. The damping system 600 can have one or

more front stops 604a and one or more intermediate stops 604c. For instance, the damping

system 600 can have two front stops 604a, each positioned on either side of the frame 3 at a

proximal end 6 of the center sill pocket 4. The damping system 600 can have two

intermediate stops 604c, each positioned on either side of the frame 3 at a position between

the proximal and distal ends 6, 5 of the center sill pocket 4. A yoke 608 is provided in the

center sill pocket 4, the yoke 608 being an elongated member and oriented along the

longitudinal axis 2. The yoke 608 has opposing top and bottom walls 608a, 608b extending

longitudinally. The yoke 608 further has a distal end wall 608c connecting the top and

bottom walls 608a, 608b to define a yoke pocket 608d. A damping assembly 602 (or

damping means) is disposed in the yoke pocket 608d, and is configured for receiving and

dissipating external forces acting on a coupler 610 connected to the yoke 608.

[0082] The damping system 600 includes a longitudinally moveable member 614 having at

least one side wall 614a extending longitudinally along the center sill pocket 4. The

longitudinally moveable member 614 has proximal and distal ends 614b, 614c and an end

wall 614d connected to the side wall distal end 614c. The end wall 614d is configured to be

transverse to the longitudinal axis 2 and to extend into the yoke pocket 608d.

[0083] The damping system 600 has a front follower block 606 positioned within the yoke

pocket 608d for movement along the longitudinal axis 2. The front follower block 606 is

positioned transversely of the longitudinal axis 2. The front follower block 606 has opposing

proximal and distal facing stop sides 606a, 606b, and it is positioned between the front and

intermediate stops 604a, 604c. The front follower block 606 can be a planar member that is

square or rectangular shaped.

[0084] The damping system 600 has a rear follower block 607 positioned within the yoke

pocket 608d for movement along the longitudinal axis 2. The rear follower block 607 is

positioned transversely of the longitudinal axis 2. The rear follower block 607 has opposing

proximal and distal facing stop sides 607a, 607b. The rear follower block 607 is positioned

between the intermediate stop 604c and the yoke distal end wall 608c. The rear follower

block 607 can be a planar member that is square or rectangular shaped.

[0085] The embodiment shown in FIGS. 15-17 has two front stops 604a and two

intermediate stops 604c. Each front stop 604a is disposed at a proximal end 6 of the center

sill pocket 4. Each intermediate stop 604c is disposed at a location between the proximal and

distal ends 6, 5 of the center sill pocket 4. The front and intermediate stops 604a, 604c in this

embodiment can be square or rectangular.

[0086] In buff movement, the front follower block 606 is urged toward the distal end 5 of the

center sill pocket 4 and engages the damping assembly 602. The front follower block 606

WO wo 2022/150387 PCT/US2022/011313

further travels along the center sill pocket 4 and engages the side wall 614a of the

longitudinal moveable member 614, defining a full buff position.

[0087] In draft movement, the rear follower block 607 is urged toward the proximal end 6 of

the center sill pocket 4 until the rear follower block 607 engages the intermediate stop 604c,

defining a full draft position.

[0088] Referring to FIGS. 18-20, a sixth embodiment of the railcar damping system 700 is

stops 704a, 704c, defining a center sill pocket 4. The damping system 700 can have one or

more front stops 704a and one or more intermediate stops 704c. For instance, the damping

system 700 can have two front stops 704a, each positioned on either side of the frame 3 at a

proximal end 6 of the center sill pocket 4. The damping system 700 can have two

intermediate stops 704c, each positioned on either side of the frame 3 at a position between

the proximal and distal ends 6, 5 of the center sill pocket 4. A yoke 708 is provided in the

center sill pocket 4, the yoke 708 being an elongated member and oriented along the

longitudinal axis 2. The yoke 708 has opposing top and bottom walls 708a, 708b extending

longitudinally. The yoke 708 further has a distal end wall 708c connecting the top and

bottom walls 708a, 708b to define a yoke pocket 708d. A damping assembly 702 (or

damping means) is disposed in the yoke pocket 708d, and is configured for receiving and

dissipating external forces acting on a coupler 710 connected to the yoke 708.

[0089] The damping system 700 includes a housing 714 having at least one side wall 714a

extending longitudinally along the center sill pocket 4. The housing 714 has proximal and

distal ends 714b, 714c and an end wall 714d connected to the side wall distal end 714c. The

end wall is configured to be transverse to the longitudinal axis 2 and to extend into the yoke

pocket 708d. The side wall 714a has a cut-out 716 formed in a surface thereof defining a

proximal cut-out surface 716a and a distal cut-out surface 716b.

WO wo 2022/150387 PCT/US2022/011313

[0090] The damping system 700 has a follower block 706 positioned within the yoke pocket

708d for movement along the longitudinal axis 2. The follower block 706 is positioned

transversely of the longitudinal axis 2. The follower block 706 has opposing proximal and

distal facing stop sides 706a, 706b, and it is positioned between the front and intermediate

stops 704a, 704c. The follower block 706 can be a planar member that is square or

rectangular shaped.

[0091] The embodiment shown in FIGS. 18-20 has two front stops 704a and two

intermediate intermediatestops 704c. stops EachEach 704c. frontfront stop 704a stop is disposed 704a at a proximal is disposed at a end 6 of the proximal endcenter 6 of the center

sill pocket 4. Each intermediate stop 704c is disposed at a location between the proximal and

distal ends 6, 5 of the center sill pocket 4. The front and intermediate stops 704a, 704c in this

embodiment can be square or rectangular.

[0092] In buff movement, the follower block 706 is urged toward the distal end 5 of the

center sill pocket 4 and engages the damping assembly 702. The follower block 706 further

travels along the center sill pocket 4 and engages the side wall 714a of the housing 714,

defining a full buff position.

[0093] In draft movement, the housing 714 is urged toward the proximal end 6 of the center

sill pocket 4 until the distal cut-out surface 716b engages the intermediate stop 704c, defining

a full draft position.

[0094] One of the improvements provided by the inventive system is a configuration that

incorporates a proximal stop surface and a distal stop surface. These may be formed on the

stops, the longitudinal moveable member, the housing, etc. To achieve this, the various

embodiments show I-shaped or H-shaped follower blocks, square or rectangle shaped

follower blocks, plus shaped follower blocks, square or rectangle stops, T-shaped stops, C-

shaped stops, T-shaped proximal ends of the longitudinal movable member or housing, etc.

It is understood, however, that other shapes, configuration, arrangements, and combinations thereof can be used. For instance, the stops can be L-shaped, any of the embodiments described using the I-shaped follower block can similarly use the plus shaped follower bock and vis-versa, etc. Thus, other shapes and configurations that allow for the use of proximal and distal stop surfaces to provide for differentiated draft and buff movements is contemplated and is therefore within the scope of this disclosure.

[0095] For instance, FIG. 21 shows additional exemplary follower block 806 and front stop

804a configurations that may be used with various embodiments of the damping system

described herein. The follower block 806 is positioned transversely of the longitudinal axis 2

and includes a protrusion 806a defining opposing proximal and distal facing stop sides 806b,

806c. For instance, the follower block 806 can be a planar member that is cross-shaped or

plus-sign shaped, such a shape having a protrusion 806a. The front stop 804a includes a

proximal stop surface 816 and two distally extending portions 818 extending longitudinally

and terminating in two distal stop surfaces 820. For instance, the front stop 804a (and also

the housing and sidewalls) can be a planar member that is C-shaped, such shape having the

two distally extending portions 818. One skilled in the art will appreciate that other

geometric shapes can be implemented in accordance with the spirit and scope of the present

invention.

[0096] Referring to FIGS. 22-25, a seventh embodiment of the railcar damping system 900 is

illustrated. In an exemplary embodiment, the railcar damping system 900 is configured for

placement in a railcar center sill having longitudinally spaced front and rear stops 904a, 904b

defining a center sill pocket 4. The railcar damping system 900 includes a yoke 908 provided

in the center sill pocket 4. The yoke 908 has a longitudinal axis. The yoke 908 further has

opposing top and bottom walls 908a, 908b extending longitudinally. The yoke 908 also has a

distal end wall 908c connecting the top and bottom walls 908a, 908b to define a yoke pocket

908d.

[0097] The railcar damping system 900 includes a damping assembly 902 that is disposed in

the yoke pocket 908d. The damping assembly 902 is configured for receiving and dissipating

external forces acting on a coupler 910 connected to the yoke 908.

[0098] The railcar damping system 900 includes a longitudinally moveable member 914,

which may be a housing having a sidewall 914a or only a sidewall 914a, extending

longitudinally along the center sill pocket 4. The longitudinally moveable member 914 has

proximal and distal ends 914b, 914c and an end wall 914d connected to the side wall distal

end 914c, wherein the end wall 914d is transverse to the longitudinal axis 2 and extends into

the yoke pocket 908d.

[0099] The railcar damping system 900 includes a follower block 906 provided within the

yoke pocket 908d for movement along the longitudinal axis 2. The follower block 906 is

positioned transversely of the longitudinal axis 2 and includes opposing proximal and distal

facing stop sides 906a, 906b, respectively. The follower block 906 can have a square or

rectangular shape.

[00100] The front stops 904a are disposed at a proximal end of the center sill pocket 4 and

the rear stops 904b are disposed at a distal end of the center sill pocket 4. The front stops

904a include a proximal stop surface 916 formed on the front stop inner surface 922, and a

distally extending portion extending longitudinally and terminating in a distal stop surface

918. The proximal stop surface 916 is in the form of a flange or protrusion 920 (e.g., a step, a

wedge formation, etc.) extending from the front stop inner surface 922, with the front stop

inner surface being generally smooth.

[00101] In buff movement, as shown in FIG. 23, the follower block 906 is urged toward the

distal end of the center sill pocket and engages the damping assembly 902. The follower

block 906 travels along the inner surface 922 of the front stop 904a and along the distally

extending portion of the front stop 904a to engage the longitudinally moveable member 914.

33

As the buff motion continues, the front follower block 906 presses against the damping

assembly 902 to cause compression of the damping assembly until the damping assembly 902

experiences full compression. When the damping assembly 902 is caused to move in buff

motion, the rear stops 904b arrest movement of the longitudinally moveable member 914

beyond a certain point. This arrested movement of the longitudinally moveable member 914

(or housing) allows the follower block 906 to fully compress the damping assembly 902.

When the longitudinally moveable member 914 movement is arrested and the damping

assembly 902 is fully compressed, this defines a full buff position.

[00102] In draft movement, as shown in FIG. 24, the longitudinally moveable member 914 is

urged toward the proximal end of the center sill pocket. During such movement, the follower

block 906 will travel along the front stop inner surface 922 and engage the proximal stop

surface 916 of the front stops 904a. The damping assembly 902 pushes against the follower

block 906, but because the follower block 906 is held stationary by the proximal stop surface

916, the damping assembly 902 begins to compress. The movement of the coupler 910 and

yoke 902, as well as the compression of the damping assembly 902, continues until the

longitudinally moveable member 914 abuts the distal stop surface 918 of the front stops 904a,

thereby arresting any further movement of the longitudinally moveable member 914 towards

the center sill pocket proximal end 6. This defines a full draft position.

[00103] The follower block 906 can have opposing side ends trimmed off SO so that it may

travel along the front stop inner surface 922 and engage the proximal stop surface 916. This

allows the damping system 902 to be compressed fully in the buff motion for maximum

energy absorption, while limiting travel in the draft motion by not permitting full

compression of the damping assembly 902 SO so as to reduce inter-car slack.

[00104] Referring to FIGS. 26-33, an eighth embodiment of the railcar damping system 1000

is illustrated. This embodiment is shown with a square shaped follower block arrangement

WO wo 2022/150387 PCT/US2022/011313

(see (see FIG. FIG. 29) 29) or or an an H-shaped H-shaped follower follower block block arrangement arrangement (see (see FIG. FIG. 33). 33). The The railcar railcar damping damping

system 1000 is configured for placement in a railcar center sill having longitudinally spaced

front, intermediate, and rear stops 1004a, 1004b, and 1004c, respectively, defining a center

sill pocket 4. The railcar damping system 1000 includes a yoke 1008 provided in the center

sill pocket 4. The yoke 1008 has a longitudinal axis. The yoke 1008 further has opposing top

and bottom walls 1008a, 1008b extending longitudinally. The yoke 1008 also has a distal

end wall 1008c connecting the top and bottom walls 1008a, 1008b to define a yoke pocket

1008d.

[00105] The railcar damping system 1000 includes a damping assembly 1002 that is

disposed in the yoke pocket 1008d. The damping assembly 1002 is configured for receiving

and dissipating external forces acting on a coupler 1010 connected to the yoke 1008.

[00106] The railcar damping system 1000 includes a longitudinally moveable member 1014

having a sidewall 1014a extending longitudinally along the center sill pocket 4. The

longitudinally moveable member 1014 has proximal and distal ends 1014b, 1014c and an end

wall 1014d connected to the side wall distal end 1014c, wherein the end wall 1014d is

transverse to the longitudinal axis 2 and extends into the yoke pocket 1008d.

[00107] The railcar damping system 1000 includes a follower block 1006 provided within

the yoke pocket 1008d for movement along the longitudinal axis 2. The follower block 1006

is positioned transversely of the longitudinal axis 2 and includes opposing proximal and distal

facing stop sides 1006a, 1006b, respectively. The follower block 1006 is shown as having a

generally square shape (FIGS. 26-28) or an H-shape (FIGS. 30-33); however, other geometric

shapes are contemplated (e.g., rectangular shape, L-shape, etc.) and can be implemented in

the various embodiments without departing from the spirit and scope of the present invention.

[00108] The front stops 1004a are disposed at a proximal end of the center sill pocket 4 and

the rear stops 1004c are disposed at a distal end of the center sill pocket 4. The intermediate stops 1004b are disposed at an intermediate position between the proximal and distal ends of the center sill pocket 4. The front stops 1004a include a stop surface 1016 formed at a distal end of the front stop 1004a. In some embodiments, each front stop 1004a can be in the shape of a wedge, wherein the thicker edge forms the stop surface 1016; however, other geometric shapes are contemplated and can be implemented in the various embodiments without departing from the spirit and scope of the present invention. The intermediate stops 1004b include a stop surface 1018 formed at a distal end of the intermediate stop 1004b. The rear stops 1004c include a stop surface 1020 formed at a proximal end of the rear stop 1004c. In some embodiments, each rear stop 1004c is in the shape of a wedge, wherein the thicker edge forms the stop surface 1020; however, other geometric shapes are contemplated and can be implemented in the various embodiments without departing from the spirit and scope of the present invention.

[00109] In buff movement, as shown in FIGS. 27 and 32, the follower block 1006 is urged

toward the distal end of the center sill pocket 4 and engages the damping assembly 1002.

The follower block 1006 travels past the intermediate stops 1004b and engages the

longitudinally moveable member 1014. In FIGS. 26-29, the follower block 1006 moves

along the inner surface of the intermediate stops 1004b due to its generally square shape. In

FIGS. 30-33, the follower block includes protrusions or flanges that pass along the top and

bottom surfaces of the intermediate stops 1004b. As the buff motion continues, the front

follower block 1006 presses against the damping assembly 1002 to cause compression of the

damping assembly until the damping assembly 1002 experiences full compression. When the

damping assembly 1002 is caused to move in buff motion, a stop surface 1020 of the rear

stops 1004c arrest movement of the longitudinally moveable member 1014 beyond a certain

point. This arrested movement of the longitudinally moveable member 1014 allows the

follower block 1006 to fully compress the damping assembly 1002. When the longitudinally moveable member 1014 movement is arrested and the damping assembly 1002 is fully compressed, this defines a full buff position.

[00110] In draft movement, as shown in FIGS. 28 and 32, the longitudinally moveable

member 1014 is urged toward the proximal end of the center sill pocket 4. During such

movement, the follower block 1006 travels past the intermediate stops 1004b and engages the

stop surface 1016 of the front stops 1004a. The damping assembly 1002 pushes against the

follower block 1006, but because the follower block 1006 is held stationary by the stop

surface 1016, the damping assembly 1002 begins to compress. The movement of the coupler

1010 and yoke 1008 as well as the compression of the damping assembly 1002, continues

until the longitudinally moveable member 1014 abuts the stop surface 1018 of the

intermediate stops 1004b, thereby arresting any further movement of the longitudinally

moveable member 1014 towards the center sill pocket proximal end. This defines a full draft

position.

[00111] FIG. 29 shows an exemplary generally square shaped follower block 1006, and FIG.

33 shows an exemplary H-shaped follower block 1006. With the square shaped follower

block 1006 embodiments, the follower block 1006 is sized to slide along an inner surface of

the intermediate stops 1004b but be in the path of the front stops 1004a (e.g., the wedge of

the front stop 1004a extends inwards more SO so than that of the intermediate stop 1004b SO so the

wedge portion is in the path of the follower block 1006 but the intermediate block 1006b is

not). With the H-shaped follower block 1006 embodiments, the follower block 1006 has

protrusions or flanges that allow the follower block 1006 to engage the front stop 1004a but

pass over and under the intermediate stops 1004b. With the H-shaped follower block 1006

embodiments, the front stop 1004a may or may not be wedge shaped. Also, with the H-

shaped follower block 1006 embodiments, the intermediate stop 1004b can be sized to fit

within the protrusions or flanges of the H-shaped follower block 1006.

[00112] It is understood that any of the embodiments disclosed herein can be made and used

with a longitudinal moveable member or a housing. For instance, an embodiment described

using a longitudinal moveable member (or housing) can be used with a similarly shaped

housing (longitudinal moveable member).

[00113] It should be understood that modifications to the embodiments disclosed herein can

be made to meet a particular set of design criteria. For instance, the number of or

configuration of components or parameters of the various embodiments may be

interchangeably used to meet a particular objective.

[00114] It will be apparent to those skilled in the art that numerous modifications and

variations of the described examples and embodiments are possible in light of the above

teachings of the disclosure. The disclosed examples and embodiments are presented for

purposes of illustration only. Other alternative embodiments may include some or all of the

features of the various embodiments disclosed herein. For instance, it is contemplated that a

particular feature described, either individually or as part of an embodiment, can be combined

with other individually described features, or parts of other embodiments. The elements and

acts of the various embodiments described herein can therefore be combined to provide

further embodiments.

[00115] It is the intent to cover all such modifications and alternative embodiments as may

come within the true scope of this invention, which is to be given the full breadth thereof.

Additionally, the disclosure of a range of values is a disclosure of every numerical value

within that range, including the end points. Thus, while certain exemplary embodiments of

the device and methods of making and using the same have been discussed and illustrated

herein, it is to be distinctly understood that the invention is not limited thereto but may be

otherwise variously embodied and practiced within the scope of the following claims.

WHAT WHAT ISISCLAIMED CLAIMED IS: 24 Jun 2025 2022206670 24 Jun 2025

IS:

1. 1. A railcar A railcar damping systemconfigured damping system configured forfor placement placement in ainrailcar a railcarcenter centersill sill having having

longitudinally spaced longitudinally spaced front, front, intermediate, intermediate, andstops and rear rear defining stops defining a center asill center sill said pocket, pocket, said railcar railcar

damping system damping system comprising: comprising:

aa yoke provided yoke provided in the in the center center sillsill pocket pocket and having and having a longitudinal a longitudinal axis, theaxis, yoke the yoke 2022206670

including opposingtop including opposing topand andbottom bottomwalls wallsextending extendinglongitudinally longitudinallyand andincluding includinga adistal distal end endwall wall

connecting the top connecting the top and and bottom bottomwalls wallstoto define define aa yoke yokepocket; pocket;

aa damping assembly damping assembly disposed disposed in in theyoke the yoke pocket pocket andand configured configured for for receiving receiving andand

dissipating dissipating external external forces forcesacting actingon ona acoupler couplerconnected connected to tothe theyoke, yoke,the thedamping damping assembly assembly

including a member including a having member having a sidewall a side wallextending extendinglongitudinally longitudinallyalong alongthe thecenter centersill sill pocket and pocket and

having proximal and distal ends and an end wall connected to the side wall distal end, the end having proximal and distal ends and an end wall connected to the side wall distal end, the end

wall transverse to the longitudinal axis and extending into the yoke pocket; wall transverse to the longitudinal axis and extending into the yoke pocket;

aa follower follower block block provided within the provided within the yoke yokepocket pocketfor for movement movement along along thethe longitudinal longitudinal

axis, axis, the followerblock the follower block positioned positioned transversely transversely of theof the longitudinal longitudinal axis andaxis and including including opposing opposing

proximal and distal facing stop sides; proximal and distal facing stop sides;

wherein the front stop includes a stop surface formed at a distal end of the front stop; wherein the front stop includes a stop surface formed at a distal end of the front stop;

whereinin wherein in buff buff movement, movement,thethefollower followerblock blockisisurged urgedtoward toward thedistal the distalend endofofthe the center center

sill sillpocket pocketand and engages engages the the damping assembly,follower damping assembly, followerblock blocktravels travelspast past the the intermediate intermediate stop stop

and engages and engages thethe side side wallwall of the of the member member definingdefining a full a full buff buff position; position;

whereinin wherein in draft draft movement, themember movement, the memberis is urged urged toward toward the the proximal proximal end end of the of the center center

sill sill pocket until the pocket until theproximal proximalendend of the of the member member engagesengages a distal astop distal stopofsurface surface of the intermediate the intermediate

stop defininga afull stop defining fulldraft draftposition, position,

whereinthe wherein the follower follower block blockis is any any one of H-shaped one of orL-shaped. H-shaped or L-shaped.

39

2. The railcar railcar damping systemofofclaim claim1,1,wherein: wherein: 24 Jun 2025 2022206670 24 Jun 2025

2. The damping system

the member the member isisaa longitudinally longitudinally moveable moveablemember, member, wherein: wherein:

in in buff movement, buff movement, the the follower follower block block is toward is urged urged the toward theenddistal distal end of the of the center center sill sill

pocket and pocket andengages engagesthe thedamping damping assembly, assembly, follower follower block block travels travels pastthe past theintermediate intermediatestop stopand and

engages the side engages the side wall wall of of the the longitudinally longitudinallymoveable member moveable member defining defining a fullbuff a full buffposition; position; 2022206670

in draft in draftmovement, the longitudinally movement, the longitudinally moveable member moveable member is is urged urged toward toward thethe proximal proximal end end

of the of the center center sill sillpocket until pocket thethe until proximal endendofof proximal thethe longitudinally moveable longitudinally moveablemember engagesaa member engages

distal distal stop surfaceofofthe stop surface theintermediate intermediate stopstop defining defining a fulla draft full draft position; position;

or; or;

the member the member isisaa housing, housing,wherein whereinthe theside side wall wall of of the the housing has aa cut-out housing has cut-out formed in aa formed in

surface thereofdefining surface thereof defining a proximal a proximal cut-out cut-out surface surface and a cut-out and a distal distal cut-out surface, surface, wherein: wherein:

pocket and pocket andengages engagesthe thedamping damping assembly, assembly, andand thethe follower follower block block further further travelsalong travels alongthe thecenter center

sill sill pocket andengages pocket and engagesthe the sideside wallwall of housing of the the housing defining defining a fullposition; a full buff buff position;

in in draft movement, draft movement, the the housing housing is urged is urged toward toward the proximal the proximal end of theend of the center sill center pocket sill pocket

until the distal cut-out surface engages the intermediate stop defining a full draft position. until the distal cut-out surface engages the intermediate stop defining a full draft position.

3. 3. The railcar The railcar damping systemofofclaim damping system claim1,1,wherein whereinthe thedamping damping system system is configured is configured

to facilitate to facilitate full compression full compressionofofthe damping the damping assembly in buff assembly in buff movement butpartial movement but partialcompression compression

of of the the damping assemblyinindraft damping assembly draftmovement. movement.

4. 4. The railcar damping system of claim 1, wherein the follower block includes a flange The railcar damping system of claim 1, wherein the follower block includes a flange

portion defining the opposing proximal and distal facing stop sides. portion defining the opposing proximal and distal facing stop sides.

40

5. A railcar railcar damping systemconfigured configured forfor placement in ainrailcar a railcarcenter centersill sill having having 24 Jun 2025 Jun 2025 5. A damping system placement

longitudinally spaced longitudinally spaced front front and and rearrear stops stops defining defining a center a center sill pocket, sill pocket, said railcar said railcar damping damping system system

comprising: comprising: 2022206670 24

aa yoke provided yoke provided in the in the center center sillsill pocket pocket and having and having a longitudinal a longitudinal axis, theaxis, yoke the yoke

including opposingtop including opposing topand andbottom bottomwalls wallsextending extendinglongitudinally longitudinallyand andincluding includinga adistal distal end endwall wall 2022206670

dissipating external dissipating external forces forcesacting actingon ona acoupler couplerconnected connected to tothe theyoke, yoke,the thedamping damping assembly assembly

wall transverse to the longitudinal axis and extending into the yoke pocket, and the side wall wall transverse to the longitudinal axis and extending into the yoke pocket, and the side wall

having an having an extension extensionextending extendinglongitudinally longitudinallyfrom fromthe theside sidewall wall proximal proximalend; end;

axis, axis, the followerblock the follower block positioned positioned transversely transversely of theof the longitudinal longitudinal axis andaxis and including including a flange a flange

portion defining opposing proximal and distal facing stop sides; portion defining opposing proximal and distal facing stop sides;

wherein the front stop is disposed at a proximal end of the center sill pocket and the rear wherein the front stop is disposed at a proximal end of the center sill pocket and the rear

stop is disposed stop is disposedatata adistal distalend endof of thethe center center sillsill pocket; pocket;

sill sill pocket andengages pocket and engagesthe the damping damping assembly, assembly, theportion the flange flangeofportion of theblock the follower follower block travels travels

along the extension along the of the extension of the member andengages member and engages a distalstop a distal stopsurface surface of of the the member defininga a member defining

full full buff position; buff position;

41 whereinin in draft draft movement, themember memberis is urged toward thethe proximal end end of the center 24 Jun 2025 2022206670 24 Jun 2025 wherein movement, the urged toward proximal of the center sill sill pocket until aa proximal pocket until proximal stop stop surface surface of the of the member member engagesengages the frontthe front stop stopadefining defining a full draft full draft position; position; whereinthe wherein the follower follower block blockis is any one of any one of H-shaped orL-shaped. H-shaped or L-shaped.

6. 6. The railcar The railcar damping systemofofclaim damping system claim5,5,wherein: wherein: 2022206670

pocket and pocket andengages engagesthe thedamping damping assembly, assembly, thethe flange flange portion portion of of thefollower the followerblock blocktravels travelsalong along

the extension the extension of of the the member andengages member and engagesa adistal distalstop stop surface surface of of the the longitudinally longitudinally moveable moveable

memberdefining member defininga afull fullbuff buff position; position;

in in draft draftmovement, the longitudinally movement, the longitudinally moveable moveablemember member is urged is urged toward toward the the proximal proximal

end of the end of the center center sill sillpocket pocketuntil untila proximal stop a proximal surface stop of of surface thethe longitudinally moveable longitudinally member moveable member

engages thefront engages the front stop stop defining defining a full a full draft draft position; position; or: or:

the member the member isisaa housing, housing,wherein: wherein:

pocket and pocket and engages engagesthe thedamping damping assembly, assembly, thethe flange flange portion portion of of thefollower the followerblock blocktravels travelsalong along

the extension of the housing and engages a distal stop surface of the housing defining a full buff the extension of the housing and engages a distal stop surface of the housing defining a full buff

position; position;

in in draft draftmovement, the housing movement, the housingisis urged urged toward towardthe theproximal proximalend endofofthe thecenter centersill sill pocket pocket

until a proximal stop surface of the housing engages the front stop defining a full draft position. until a proximal stop surface of the housing engages the front stop defining a full draft position.

7. 7. The railcar The railcar damping systemofofclaim damping system claim5,5,wherein whereinthe thedamping damping system system is configured is configured

42

8. A railcar railcar damping systemconfigured configured forfor placement in ainrailcar a railcarcenter centersill sill having having 24 Jun 2025 2022206670 24 Jun 2025

8. A damping system placement

comprising: comprising:

proximal and distal facing stop sides; proximal and distal facing stop sides;

wherein the front stop includes a proximal stop surface formed on an inner surface of the wherein the front stop includes a proximal stop surface formed on an inner surface of the

front stopand front stop anda adistally distallyextending extending portion portion extending extending longitudinally longitudinally and terminating and terminating in a distal in a distal

stop surface; stop surface;

sill sillpocket pocketand and engages engages the the damping assembly,follower damping assembly, followerblock blocktravels travelsalong alongthe the inner inner surface surface of of

the distally extending portion of the front stop and engages the side wall of the member defining the distally extending portion of the front stop and engages the side wall of the member defining

aa full full buff position; buff position;

43 whereinin in draft draft movement, themember memberis is urged toward thethe proximal end end of the center 24 Jun 2025 2022206670 24 Jun 2025 wherein movement, the urged toward proximal of the center sill sill pocket until the pocket until the proximal proximalendend of the of the member member engagesengages thestop the distal distal stopofsurface surface of stop the front the front stop defining defining a afull fulldraft draftposition. position.

9. 9. The railcar The railcar damping systemofofclaim damping system claim8,8,wherein: wherein:

the member the member isisaa longitudinally longitudinally moveable moveablemember, member, wherein: wherein: 2022206670

in in buff movement, buff movement, the the follower follower block block is toward is urged urged the toward theenddistal distal end of the of the center sillcenter sill

pocket and pocket and engages engagesthe thedamping damping assembly, assembly, follower follower block block travels travels along along theinner the innersurface surfaceofofthe the

distally extendingportion distally extending portion of the of the front front stopstop and engages and engages thewall the side side of wall of the longitudinally the longitudinally

moveablemember moveable member defining defining a full a full buffposition; buff position;

end of the end of the center center sill sillpocket pocketuntil untilthethe proximal end proximal ofofthethe end longitudinally moveable longitudinally moveablemember member

engages thedistal engages the distalstop stop surface surface of the of the front front stopstop defining defining a fulla draft full draft position. position.

or; or;

the member the member isisaa housing, housing,wherein: wherein:

distally extendingportion distally extending portion of the of the front front stopstop and engages and engages thewall the side side of wall of the defining the housing housingadefining a

full full buff position; buff position;

in in draft draft movement, movement, the the housing housing is urged is urged towardtoward the proximal the proximal end of theend of the center sillcenter pocket sill pocket

until the proximal end of the housing engages the distal stop surface of the front stop defining a until the proximal end of the housing engages the distal stop surface of the front stop defining a

full full draft draft position. position.

44

10. The The railcar damping system of claim 8, wherein the damping systemsystem is configured 24 Jun 2025 2022206670 24 Jun 2025

10. railcar damping system of claim 8, wherein the damping is configured

11. 11. A railcar A railcar damping damping system system configured configured for placement for placement in a railcar in a railcar centercenter sill having sill having

longitudinally spaced longitudinally spaced front front and and rearrear stops stops defining defining a center a center sill pocket, sill pocket, said railcar said railcar damping damping system system 2022206670

comprising: comprising:

connectingthe connecting the top top and and bottom bottomwalls wallstoto define define aa yoke yokepocket; pocket;

wherein the front stop includes a proximal stop surface and a distally extending portion wherein the front stop includes a proximal stop surface and a distally extending portion

extending longitudinally extending longitudinally and and terminating terminating in a distal in a distal stop surface; stop surface;

45 along thedistally distallyextending extending portion of front the front stop stop and engages the sidethe side wallmember of the member 24 Jun 2025 2022206670 24 Jun 2025 along the portion of the and engages wall of the defining defining a afull fullbuff buffposition; position; whereinin wherein in draft draft movement, themember movement, the memberis is urged urged toward toward the the proximal proximal end end of the of the center center sill sill pocket until the pocket until the proximal proximalendend of the of the member member engagesengages thestop the distal distal stopofsurface surface of stop the front the front stop defining a full draft position. defining a full draft position. 2022206670

12. 12. The The railcar railcar damping damping system system of claim of claim 11, wherein: 11, wherein:

in in buff movement, buff movement, the the follower follower block block is urged is urged toward toward theenddistal the distal end of the of the center center sill sill

the distally extending portion of the front stop and engages the side wall of the longitudinally the distally extending portion of the front stop and engages the side wall of the longitudinally

engages thedistal engages the distalstop stop surface surface of the of the front front stopstop defining defining a fulla draft full draft position; position;

or; or;

the member the member isisaa housing, housing,wherein: wherein:

the distally extending portion of the front stop and engages the side wall of the housing defining the distally extending portion of the front stop and engages the side wall of the housing defining

aa full full buff position; buff position;

in in draft draft movement, movement, the the housing housing is urged is urged toward toward the proximal the proximal end of theend of the center sillcenter pocket sill pocket

full full draft draft position. position.

46

Claims

13. The The railcar damping system of claim 11, wherein the damping systemsystem is configured 24 Jun 2025

2025 13. railcar damping system of claim 11, wherein the damping is configured

to facilitate to facilitate full compression full compressionofofthe damping the damping assembly in buff assembly in buff movement butpartial movement but partialcompression compression 2022206670 24 Jun

14. 14. The The railcar railcar damping damping system system of claim of claim 11, wherein: 11, wherein:

the front stop includes a proximal stop surface and two distally extending portions the front stop includes a proximal stop surface and two distally extending portions 2022206670

extending longitudinally extending longitudinally and and terminating terminating in two in two stop distal distal stop surfaces; surfaces;

in in buff movement, buff movement, the the follower follower block block is urged is urged toward toward the theenddistal distal end of the of the center center sill sill

the two distally extending portions of the front stop and engages the side wall of the member the two distally extending portions of the front stop and engages the side wall of the member

defining defining a afull fullbuff buffposition; position;

in in draft draftmovement, the member movement, the member is is urgedtoward urged toward thethe proximal proximal endend of of thethe center center sillpocket sill pocket

until the proximal end of the member engages the two distal stop surfaces of the front stop until the proximal end of the member engages the two distal stop surfaces of the front stop

defining defining a afull fulldraft draftposition. position.

15. 15. A railcar A railcar damping damping system system configured configured for placement for placement in a railcar in a railcar centercenter sill having sill having

longitudinally spacedfront longitudinally spaced frontand andintermediate intermediate stops stops defining defining a center a center sill sill pocket, pocket, saidsaid railcar railcar

damping system damping system comprising: comprising:

comprising: a housing comprising: a housing having having a sidea wall sideextending wall extending longitudinally longitudinally along the along center the sill center pocket sill and pocket and

47 wall transverse to the longitudinal axis and extending into the yoke pocket; and the side wall 24 Jun 2025 Jun 2025 wall transverse to the longitudinal axis and extending into the yoke pocket; and the side wall having a cut-out formed in a surface thereof defining a proximal cut-out surface and a distal cut- having a cut-out formed in a surface thereof defining a proximal cut-out surface and a distal cut- out surface; out surface;

2022206670 24

axis, axis, the followerblock the follower block positioned positioned transversely transversely of theof the longitudinal longitudinal axis, axis, the thefollower front front follower block block 2022206670

having opposing having opposingproximal proximal and and distalfacing distal facingstop stopsides; sides;

wherein the front stop is disposed at a proximal end of the center sill pocket and the wherein the front stop is disposed at a proximal end of the center sill pocket and the

intermediate stop intermediate stop is is disposed disposed at aatlocation a location between between the proximal the proximal and and distal distal ends ends of the of the center sillcenter sill

pocket, pocket,

sill sillpocket pocketand and engages engages the the damping assembly,and damping assembly, andthe thefollower followerblock blockfurther furthertravels travels along the along the

center sill pocket center sill andengages pocket and engages the the side side wall wall ofhousing of the the housing definingdefining a full a full buff buff position; position;

whereinin wherein in draft draft movement, thehousing movement, the housingisisurged urgedtoward towardthetheproximal proximal end end of of thecenter the center

sill sill pocket until the pocket until the distal distal cut-out cut-outsurface surfaceengages engages the the intermediate intermediate stop defining stop defining a full draft a full draft

position. position.

16. 16. The The railcar railcar damping damping system system of claim of claim 15, wherein 15, wherein the damping the damping systemsystem is configured is configured

17. 17. A railcar A railcar damping damping system system configured configured for placement for placement in a railcar in a railcar centercenter sill having sill having

damping system damping system comprising: comprising:

48 aa yoke provided in the center sillsill pocket and having a longitudinal axis, theaxis, yoke the yoke 24 Jun 2025 2022206670 24 Jun 2025 yoke provided in the center pocket and having a longitudinal including opposingtop including opposing topand andbottom bottomwalls wallsextending extendinglongitudinally longitudinallyand andincluding includinga adistal distal end endwall wall connecting the top connecting the top and and bottom bottomwalls wallstoto define define aa yoke yokepocket; pocket; aa damping assembly damping assembly disposed disposed in in theyoke the yoke pocket pocket andand configured configured for for receiving receiving andand dissipating external dissipating external forces forcesacting actingon ona acoupler couplerconnected connected to tothe theyoke, yoke,the thedamping damping assembly assembly 2022206670 including a longitudinally including a longitudinally moveable member moveable member having having a side a side wall wall extending extending longitudinally longitudinally along along the center sill pocket and having proximal and distal ends and an end wall connected to the side the center sill pocket and having proximal and distal ends and an end wall connected to the side wall distal end, the end wall transverse to the longitudinal axis and extending into the yoke wall distal end, the end wall transverse to the longitudinal axis and extending into the yoke pocket; pocket; aa front front follower follower block block provided provided within within the the yoke pocket for yoke pocket for movement along movement along thethe longitudinal axis,the longitudinal axis, thefront frontfollower follower block block positioned positioned transversely transversely of the longitudinal of the longitudinal axis, the axis, the front followerblock front follower block having having opposing opposing proximal proximal andfacing and distal distalstop facing stop sides, the sides, the front follower front follower block positioned block positioned between betweenthe thefront front and andintermediate intermediatestops; stops; aa rear rear follower follower block block provided provided within the yoke within the pocket for yoke pocket for movement along movement along thethe longitudinal axis, the rear follower block positioned transversely of the longitudinal axis, the rear longitudinal axis, the rear follower block positioned transversely of the longitudinal axis, the rear follower block having follower block havingopposing opposingproximal proximal and and distalfacing distal facingstop stopsides, sides, the the rear rear follower follower block block positioned between positioned betweenthe theintermediate intermediatestop stopand andthe the yoke yokedistal distal end end wall; wall; wherein the front stop is disposed at a proximal end of the center sill pocket and the wherein the front stop is disposed at a proximal end of the center sill pocket and the intermediate stop intermediate stop is is disposed disposed at aatlocation a location between between the proximal the proximal and and distal distal ends ends of the of the center sillcenter sill pocket; pocket; whereinin wherein in buff buff movement, movement,thethefront frontfollower followerblock blockisisurged urgedtoward towardthe thedistal distal end end of of the the center sill pocket center sill andengages pocket and engages the the damping damping assembly, assembly, and the and the front frontblock follower follower block further further travels travels

49 along the center center sill sillpocket pocketand andengages engages the the side sidewall wallofofthe longitudinal moveable moveable member 24 Jun 2025 2022206670 24 Jun 2025 along the the longitudinal member defining defining a afull fullbuff buffposition; position; whereinin wherein in draft draft movement, therear movement, the rearfollower followerblock blockisis urged urged toward towardthe theproximal proximalend endofof the centersill the center sill pocket untilthe pocket until therear rearfollower follower block block engages engages the intermediate the intermediate stop defining stop defining a full a full draft position. draft position. 2022206670

50